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Abstract
The type and a second specimen of Perenniporia detrita (Basidiomycetes, Aphyllophorales) have been studied in order to ascertain the status of this taxon. These studies have shown that two species were included in the original material. Furthermore, the types of the previously proposed taxonomic synonyms of Pe. detrita, viz. Polyporus vicinus, Po. delavayi, Fomes mesoleucus, Po. labis and Trametes atra were reexamined. The three former represent three distinct species. The types of Polyporus labis and T. atra are sterile and their identification is uncertain. Perenniporia sprucei is described as new, and the new combinations Pe. delavayi (synonym Pe. formosana) and Pe. vicina are proposed.